Help with Datamanager/Sending Private Messages

[neilsimp1]

I've done a bit more digging, and I believe I'm close with something like this:

PHP Code:

$data = array('sentto' => $recipients,
            'msgRecipients' => $recipients,
            'msgtype' = 'message',
            'title' => $title, 
            'rawtext' => $message, 
            'sender' => $fromuserid,
            'contenttypeid' => 27);
        
$pm_library = vB_Library::instance('Content_Privatemessage');

$options = array();        

$pm_library->add($data, $options); 


But I'm getting the error below, pretty much no matter what I do with the parameters at this point.
I'm not sure if it's the $data or the $options array that's having the "Illegal offset" problems, evan after looking at /vb/library/content/privatemessage.php

Warning: Illegal offset type in isset or empty in .../vb/library/content/privatemessage.php on line 1723 Warning: Illegal offset type in .../vb/library/content/privatemessage.php on line 1787 Warning: Illegal offset type in .../vb/library/content/privatemessage.php on line 564 API Error
Error: database_cant_escape_param
Args:
array (
  0 => 'array',
)

Can anyone point me in the right direction?